A selective solar irradiance spectrometer

Details A selective solar irradiance spectrometer A selective solar irradiance spectrometer

May 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...109...32o&link_type=abstract

Astronomy and Astrophysics, vol. 109, no. 1, May 1982, p. 32-36. Research supported by the Nederlandse Organisatie voor Zuiver-

Astronomy and Astrophysics

Astrophysics

5

Calcium, H Lines, Irradiance, K Lines, Solar Spectra, Solar Spectrometers, Astronomical Spectroscopy, Integrators, Spectral Resolution, Stellar Spectrophotometry

Scientific paper

An optical device is described for the averaging of intensity over solid angle. This integrator serves to obtain irradiance spectra from the entire solar disk, or from smaller areas of arbitrary size and shape. The integrator consists of optical elements inserted between a conventional telescope and spectrometer. The loss in signal in comparison with intensity spectrometry is only about 50%, and there is no loss of spectral resolution. Illustrative results are shown from the Utrecht 'the-sun-as-a-star' monitoring program of the disk-averaged Ca II H and K line cores.

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